Performance Traction Management: How it Works

We've been told PTM is so good it helps pro drivers go faster. Naturally, we put it to the test with Tommy Milner behind the wheel.

GM's advanced traction control system was introduced on the ZR1 and is now available on Z06s equipped with MRC suspension. We've been told PTM is so good it helps pro drivers go faster. Naturally, we put Tommy Milner to the test. He was instructed to take corner B repeatedly in all 5 modes. All he had to do was drive hard into the turn, then floor the throttle past the apex and let PTM manage the power as he steered the car. When we finally turned PTM off to see if Milner would be quicker without it, he pushed the ZR1 hard and came close to the fastest time, but was still not quite up to his performance with it in Mode 4. Chalk this match up to the computer...

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Mode

What it Does

Time, sec

1 Wet

For use in damp or wet track conditions by drivers of all skill levels. Engine torque is managed based on wet track conditions. Traction and yaw control are enabled.

8.96

2 Dry

For use in dry conditions by less experienced drivers, or those learning a new track. Engine torque is slightly managed based on track conditions. Traction and yaw control are fully enabled. This is comparable to the Competition Mode on previous Corvettes.

8.62

3 Sport

For use in dry conditions by drivers familiar with the track. More engine torque is available than in Mode 2. Traction and yaw control are reduced.

8.63

4 Sport

For use in dry conditions by drivers familiar with the track. The same level of engine torque is available as in Mode 3. Yaw control is disabled.

8.39

5 Race

For use in dry conditions by experienced drivers familiar with the track. This mode requires more driver skill than all the other modes. Available engine torque is maximized for cornering speed. Yaw control is disabled.